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Deer Creek at Rocks, MD Water Level Today

Maryland · USGS gauge 01580000 · live data · Updated Oct 28, 2026

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About this gauge

USGS gauge 01580000 sits on Deer Creek and reads everything draining 94 square miles of the Lower Susquehanna basin. Its datum sits 250 feet above sea level NAVD88. Daily flow has been on record here since 1927, 100 years of it.

Where this gauge sits in the drainage

One gauged site sits upstream of here. The closest is Deer Creek at Eden Mill Dam near Pylesville, MD, reading 61 square miles. This gauge adds the 33 square miles that drain in between. Downstream the next reading comes from Deer Creek near Darlington, MD at 164 square miles, so what passes this gauge is about 58% of the water measured there.

Normal flows here

Deer Creek runs a median of 94 cfs at this gauge across 100 years of record. April is the fullest month at a median 140 cfs, and September the leanest at 60 cfs. The highest daily mean on record is 6,610 cfs in 1972, and the lowest is 4.0 cfs in 2002.

Median flow by month
MonthMedian flowShare of annual median
Jan105 cfs112%
Feb122 cfs130%
Mar137 cfs146%
Apr140 cfs149%
May128 cfs136%
Jun100 cfs106%
Jul77 cfs82%
Aug66 cfs70%
Sep60 cfs64%
Oct62 cfs66%
Nov74 cfs79%
Dec92 cfs98%

Medians from the USGS daily-statistics record, 1927 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

Deer Creek reaches flood stage at this gauge at 11 feet. NWS starts watching it at 10 feet. The highest crest on record is 17.7 feet, in August 1933.

NWS flood categories
CategoryGage height
Action10 ft
Minor flooding11 ft
Moderate flooding13 ft
Major flooding15 ft
Highest crests on record
WhenCrest
August 193317.7 ft
June 197217.1 ft
September 193415.9 ft
November 192615.4 ft
May 198914.5 ft

Flood categories and crest history from the NOAA National Water Prediction Service, gauge RSPM2. Stages are gage height, not depth. Not for navigation.

Nearby river gauges

Live streamflow and gage height: USGS gauge 01580000. Percentile context computed against the gauge's period of record. Not for navigation.

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